Yagoubov, P.A. and Lange de, G. and Baryshev, A.M. and Hesper, R. and Koshelets, V.P. and Wagner, Georg and Birk, Manfred and Murk, A. (2007) Optical design and verification of the sub-millimeter limb sounder TELIS. In: Proceedings of the 18th International Symposium on Space Terahertz Technology. 18th International Symposium on Space Terahertz Technology, 2007-03-21 - 2007-03-23, Pasadena, CA (USA).
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TELIS (Terahertz and submm Limb Sounder) is cooperation between European institutes, DLR, RAL and SRON, to build a three-channel balloon-borne heterodyne spectrometer for atmospheric research. The optical front-end of the instrument consists of a dual-offset Cassegrain pointing telescope, calibration blackbody and relay optics, common for the three channels. Beam separation between the channels is performed quasioptically by a dichroic filter and a polarizer. After the splitting, the three beams enter liquid helium cooled cryostat, where each receiver has dedicated cold optics and mixer elements. In this paper we present optical design and experimental results of the quasioptical 500 - 650 GHz channel for TELIS. It is based on a phase-locked Superconducting Integrated Receiver (SIR). The SIR chip is placed on the flat back surface of the elliptical silicon lens. Further shaping and relaying of the beam is done by means of reflective optics. Design and validation of the optics, as well as estimation of optical components tolerances, have been performed using commercial software packages ZEMAX and GRASP. In this paper we present experimental results of the amplitude-phase beam pattern measurements of the SIR cold optics performed at 620 GHz. We have also measured amplitude beam pattern of the complete instrument, including the telescope, using the compact range. Results of these tests will be presented at the conference.
|Document Type:||Conference or Workshop Item (Poster)|
|Title:||Optical design and verification of the sub-millimeter limb sounder TELIS|
|Journal or Publication Title:||Proceedings of the 18th International Symposium on Space Terahertz Technology|
|In ISI Web of Science:||No|
|Keywords:||Cryogenic terahertz heterodyne receiver, atmospheric remote sensing, TELIS, submillimeter heterodyne receiver|
|Event Title:||18th International Symposium on Space Terahertz Technology|
|Event Location:||Pasadena, CA (USA)|
|Event Type:||international Conference|
|Event Dates:||2007-03-21 - 2007-03-23|
|Organizer:||California Institute of Technology|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W EO - Erdbeobachtung|
|DLR - Research area:||Space|
|DLR - Program:||W EO - Erdbeobachtung|
|DLR - Research theme (Project):||W - Projekt TELIS (old)|
|Institutes and Institutions:||Remote Sensing Technology Institute > Experimental Methods|
|Deposited By:||Dr.rer.nat. Georg Wagner|
|Deposited On:||15 Sep 2008|
|Last Modified:||14 May 2013 13:54|
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